diff --git a/static/application.js b/static/application.js
index dab2a5e..e018681 100644
--- a/static/application.js
+++ b/static/application.js
@@ -208,8 +208,7 @@ haste.prototype.addLineNumbers = function(data) {
 };
 
 haste.prototype.getCharacterWidth = function() {
-  var $div = $("<div></div>");
-  $("body").append($div);
+  var $div = $("#sandbox");
   $div.html('a');
   $div.css('width','auto')
       .css('font', $("code").css('font'))
diff --git a/static/index.html b/static/index.html
index f4f22f7..cb7cc1b 100644
--- a/static/index.html
+++ b/static/index.html
@@ -63,7 +63,8 @@
 		<div id="linenos"></div>
 		<pre id="box" style="display:none;" tabindex="0"><code></code></pre>
 		<textarea spellcheck="false" style="display:none;"></textarea>
-
+		<div id="sandbox">
+		</div>
 	</body>
 
 </html>